IPv6 growing up: ssh attempts to an inside machine / 2019-08-01

IPv6 is growing up: I saw an ssh attempt to an inside machine, reachable only via IPv6. The source was a Chinese IPv6 address which had not tried anything on any other public service.

Jul 30 18:39:02 ritchie sshd[27454]: Bad protocol version identification '\026\003\001' from 240e:d9:d800:200::212 port 44926